Definition of 20:
(N) :
(twenty) the natural number following 19 and preceding 21.
(N) :
an album by American singer and
(N) :
the eleventh album by Estonian rock band Terminaator, released in 2007.
(N) :
the 1992 retrospective two-CD box set by contemporary Christian music group 2nd Chapter of Acts.
(N) :
20 [Twenty] (stylized as 20 [twenty]) is the third studio album released in Japan by South Korean rock band F.T. Island.
(N) :
a studio album by English folk musician Kate Rusby, released on 22 October 2012 on Pure Records.